How to stop chasing Will-o-the-wisps

In ancient English lore, a Will-o-the-wisp is a mischievous spirit of swampy and dark places that uses a lantern-like light to lure unwary travelers off the path. Travelers may mistake the Will-o-the-wisp for a fellow traveler leading the way or for a kindlier spirit, such as a Leprechaun, who might lead them to treasure.